These peppermint bark icebox cookies feature an easy slice and bake chocolate mint icebox cookie drizzled with white chocolate and sprinkled with crushed peppermints for a pretty, delicious Christmas cookie!
Melt the unsweetened chocolate in a microwave-safe bowl in 30-second intervals, stirring between each, until smooth. Set aside.
In the bowl of a stand mixer or in a large bowl with a hand mixer, beat the butter and sugars together until light and fluffy.
Add the egg and peppermint extract and mix until smooth.
Add the melted chocolate and the espresso powder and mix.
Add the flour, baking soda and salt. Mix until just combined.
Turn the dough out onto a piece of parchment or waxed paper. Roll into a log about 2 inches wide and 8 inches long. Twist the ends to seal and refrigerate until firm, at lest 2 hours, or up to overnight.
Once the dough is firm, preheat the oven to 350°F and line a baking sheet with parchment.
Remove the dough from the oven slice into 1/4 to 1/2 inch thick slices. Place on the lined baking sheet.
Bake 9 minutes. Remove from the oven and place on a wire cooling rack to cool.
Melt the white chocolate in the microwave, in 30 second intervals, stirring between each, until just melted and smooth.
Drizzle the cookies with melted white chocolate. Sprinkle with crushed peppermints while the chocolate is still wet.
Let the cookies rest until the chocolate is firm before storing.
Use room temperature butter and egg so that the dough blends easily. Set the butter and egg out about an hour before baking. To bring butter to room temperature quickly, you can microwave it for 5-10 seconds on half power (or the defrost setting). Place the egg (in the shell) in a cup of warm water for 5-10 minutes to bring it to room temperature quickly.
Careful not to over-heat the chocolate and white chocolate when melting, as it will burn easily. Microwave in 30-second intervals, stirring well in between each until it is just melted. If you do overheat the chocolate, you might be able to save it by stirring in just a bit of coconut oil.
Let the cookies cool completely before drizzling with chocolate. Then let the chocolate harden completely before storing.
Store cookies in an airtight container at room temperature up to 5 days.